This is called a Swedish flame. Make your cuts like you're cutting cake, leave about 6 inches at the base, throw about a cap full of fuel oil in it. It burns up to two to three hours Can use olive oil instead of fuel oil :-) Any oil will burn!
You can thank a Russian guy for showing us how to remove scratches on cars in this amazing video clip, using the spray. And we are definitely trying it! We pretty sure you have at least one spray forgotten somewhere in your garage or basement,